Trimmer for chain welding machines



P 1944- v o. w. WINTER. 2,358,197

TRIMMER FOR CHAIN WELDING MACHINES Fild Dec. 3, 1941 2 Sheets-Sheet l INVENTOR BY OHOWWmIQr,

Mr Q14, ATT NEYS Se t. 12, 1944.

o. w. WINTER 2,358,197

TRIMMER FOR CHAIN WELDINGMACHINES Filed Dec. 3, 1941 2 Sheets-Sheet 2 ATTO NEYS Patented Sept. 12, 1944 l UNITED STATES T ICE-f,

TRIMMER FOR CHAIN WELDING -MACHINES Otto W. Winter, Grand Islande -N. Yg assignor to v V 7 Columbus McKinnon Chain Corporation, Tona- Wanda, N. Y., a corporation of York Q 4 Application December 3, 1941, SeriallNo. 421,480

7 Claims. (Cl. 5 -29 My invention relates in general to trimmers for chain welding machines, and particularly to a Another ject has been to provide such a shearing tool which may be pneumatically operated.

A further object has been to provide a tool so mounted that it may be accurately adjusted to the diameter of the link being welded or adjusted for various sized links.

Moreover, my shearing device quickly removes substantially all surplus metal resulting from the welding from the exterior of the link at-a radius equal substantially to and level with the diameter ofthe stock'forming the link, thus making a substantially smooth exterior surface on the link at the weld.

The above objects and advantages have been accomplished bythe device shown panying drawings, of which:

Fig. 1 is a front elevation of a welding machine showing my invention applied thereto;

Fit;- -2 is a side section elevation of the machine takenon line 11-11 of Fig. 1; v "Fig. 3 is an enlarged, perspective view showing the shearing tool in position for operation;

' Fig. 4 is an enlarged, side elevation of the shear ing tool mounting; and, e

v Fig, 5 is an enlarged, sectional view taken on line VV of Fig. 4. 7

In the drawings, l0 represents the base of the chain welding machine to which my invention is applied. This base is preferably provided at each side with upstanding fiangemembers' II and I2 which support a swage bracket l3. This bracket extends acros the machine from one flange member to the other and is insulated from the flange members and the base by means of suitable insulating strips I4, arranged under each end of the bracket. The bracket is secured in place upon the members by suitable fastening means.

i The bracket supports a swaging point preferably midway its length; Thi swaging device, which is the subject matter of another application, comprises a swagin guide l6 which is secured to the face of the swage bracket 13 and which is formed with outwardly extenddevice l5 at a V in the accoming flanges ll having islotted=opening 20 formed therein; whereby vertical adjustment of the bracket may "be had; jswage guide adjusting screws 2l -are carried by adjusting brackets 22 whereby the position of. the guide may be accurately adjusted "The guide carries. a toggle link block 23in: slidable manner and the same is held in positionwithin' the guide by means of a guide cap 24.. Mounted above the toggle link and supported by the swageibracket'is the swage cylinder .25. .The piston'rod 26' of this cylinder is connected. to;.the1toggle link block by means of a-connectingscrewtfl; v 'Theswage guide I5 is provided with two downwarclly .xextending toggle-supporting arms 3| 'which a-re ,interspaced and between which are pivotally mounted the swage arm 32. ,These arms are mountedupon swage arm bolts 33 which are mountedin the toggle-supporting arms 3!. The upper legs 34 of the swage arms are connected to the link blockby means of toggle links 3 5;wher eby reciprocal movement of the block will cause the lower legs 36 of theswage arms to be forced toward and away from each other. The lower legs of the swage arms each carry a swaging; anvil 40. .which isbrought to hearupon opposite -sidesof the link 41 producing the swaging action thereon at the joint 42 and producing the tab 43 shown in Fig. 3.

' chine by means of the feed wheel 44. This wheel is mountedupon a suitable shaft,"not shown, and rotatably supported by a bracket '45} Since this wheel and itsoperating means does not form a part of ,this invention,' it is, not further shown or described 'WhileIIfhayeIshown but one link, it

i fobvious that a continuouschain is fed through the machine in the process of welding. f The link 4 l,' ad other'linksacted upon by the machine, is held in position and Tupset, as the welding current is applied, by means of upset 'swaging anvils fbymleans'fwell known to those skilled in the a rtfjsince thefmechanisms holding andoperating he electrodes do not'form a part of this application, they arenotf furth'er shownor. describedl r f 1 Arranged at-Ql eside of the machine isa shear and upset guide bracket 55 which 'slidably sup- 63-. A stop 64 is provided at theend of the shear bar and carries an adjusting screw 65 which bear against a stop lug "66 carriedgby' the guide bracket 55 when the bar has traveledforwardly the predetermined distance.

7 herein shown and described may be made with- The forward end of the shear bar carries a shear tool holder I which ,isattachedto the bar in slidable manner by the provision of a ridge H carried by the bar and a-coacti-ng groove 12 formed in the holder. The holderjissecured to the bar by means of screws"'l3which' pass through adjusting slots 14 formed in the holder. An adjusting plate I is secured to the top of the shear bar and is preferably projected over 7 the upper: edge of:the shear tool-holderlfl, This plate" carries; an; adjusting screw 80 and. alockscr1ew,8'l: The adjusting screw is screw-threaded into the plate andhas itslowerend-dn contact with the upper-.surfacejof-the tooliholder;- whereby the. holder; mayxbe, forceddownwardly. The lock screw: BI. is screwthreaded; into the holder; passing throughan aperture: formed in the plate; An adjustinglnut 82 is carrie'dbythelockscrew BIjand byit the holder may be elevated. A-lock nut 83tiscarried by the adjusting screw, wherebyit may be locked in its adjusted-position. 1' .7

The shear tool holder. I0 isformedriwith 'aforwardly extending 7 arm 84- which has a recess: 85 on its under surfacewithin whi'chis disposed'the shear tool 86; This tool is secured in p'lace' by means of bolts 90. The tool is provided' with a cutting edge 9|; Which'is of'curv'ed formation -to correspond to the curvature of the stock forming thelink'll. I

, Carried byt heupstandin'g arms fiflof the-shear bar is a: shearswitch plate 92 which 'supports a shear switch pin-93'. Thispinserves to contact the arm 94-of-the shear sw'itch -fli wherrthe shear bar has traveled forwardly the-"predetermined T distance; The shear pin 'is adjiistably' secured to the plate 92 so that'the parts 1' y=-be-a'ccurate1y adjusted; Theshear switch'j95 s 'rried b yj the swagebracket l3. Another swij arm [0| isalso carried b'y theswage bracket-and B having 'an out departing from the spirit of my invention or the scope of the appended claims, and I do not, therefore, wish to be limited to the exact embodiment herein shown and described, the form shown being merely a preferred embodiment-thereof.

What is claimed is:

* i. In a chain welding machine, the combination with the upset bars thereof, of a shearing mechanism comprising a shearing tool having a cutting edge shaped to conform substantially to theexterior surface of the link, a slidably mounted shear bar, means for adjustably connecting the shear tool to the shear bar, comprising a tool holder carried at the forward end of said shear bar for vertical adjustment, means for clamping said holder to said bar, and means for adjusting and locking said holder, and hydraulic means connected to said shear bar for causing a rapid forward movement of said tool to shear the tab resulting from the welding'from the outer-surface of the welded side of the link while said'link is being held between the'upset bars of the machine. 2 In achain welding machine, the combination with the upset bars thereof, of a shearing. mechanism comprising a. shearingv tool having; a; cutting edge shaped to conform substantially to the exterior surface of the linkand'to engagethe welding'tab on the link while said link is beingv held by the upset bars, a slidably mounted shear bar, a hydraulic cylinder located above saidibar,

an upstanding arm carried by said-shearbar. and engageable with said cylinder. for operation there-- by, 2 and means connecting saidarm and said cylinder;

3. In a chain welding machine, thecombina- 40 tionv withthe upset bars thereof, of a shearing is in the path offthe trip dog HIT-on; thie -return strokeof the shearQbar-56; This tripqogispim: ally carried'byra tripdogholdenlfl secured-to the arm 60 of the'shear-ybar. Thistrip-dog-is controlled'by means 'of'a spring I 04 whichcauses the dog to be held normally in; the-position shown in 1.1 When the arm 'is "being moved forwardly, the dog '1 will rotate and slide under the arm l0! offthe switch-without causing the (same 'to be moved;but when the armis returned fromthe position shown in Fig; lthe dog will cause'the arm I M ofthe'switch to be actuated. This switch serves'to control other parts of the, welding machine and these switches together with the well knownsolenoidioperated valves control the supply, qf1 fluidj t'oth'e' various cylinders to bring about the desired results. Since the switches. and.,solenoid'- operated" valves tomechanism comprising a reciprocating shearv bar, ashear. tool, a vertically adjustable sheartool holder connecting said tool to said shear bar and operable uponthe link'when said link is being held between said upset bars, positive-means carried by said shear bar for adjustingsaid holder said holder in'either direction, and means'for.

gether with thespecifictype ,of cylinder, are stand ard articles of manufactufelth'ey"arei'not forefurth'er'sho'wn 01 described; 1 f

From the foregoing it will be obvious that, when theshear bar isoperated ,fQrvvardIyQtoL the position shown-in Fig 1, the shear: tool-will be carried across the top of the link and the tab 43 win looking said holder in its adjusted ip'osition.

5; A. chain weldingmachine, a support engage,- able againstthe; unbroken sides of chain links, other: means engageable againstltheends of such links to move the ends toward each other. for completing a welded joint in each, shearing means engageable againstthe outer surface of thewelded side of said link andrhovable longitudinally therealong to shear off a portion of the tab left by welding, such shearing being" accomplished with the opposite side of the linkin abut ment withsaid support whereby cleanshearing and accuratefover-all size-oflthellinks is assured;

6, A chain weldingcmachine, a support engageableagainst the unbrokensids of chain links, other means engageable against the .ends of such links to move the ends toward each" other for completing a welded joint in each, shearing means engageable against the outer surface of the welded side of said link comprising a reciprocating shear bar movable longitudinally of said link, and a shear tool secured to said bar to shear off a portion of the tab left by welding, such shearing being accomplished with the opposite side of the link in abutment with said support, whereby clean shearing and accurate over-all size of the links is assured.

7. A chain welding machine, a support engage able against the unbroken sides of chain links, other means engag'eable against the ends of such links to move the ends toward each other for abutment with said support whereby clean shearing and accurate over-all size of the links is assured.

O'I'IO W. WINTER. 

